Bank Of India — Refund processed by Amazon but not credited in bank account

I had ordered a product on[protected] on Amazon by debit card but had to cancel it on the same day due to some issues. Amazon cancelled the order and issued the refund but the amount was not received in my bank account. The amount was Rs. 2447. After 4-5 days, a refund reference number was given to me saying that the refund was issued from Amazon. I also contacted the Bank of India customer care but they aren't of much help. The refund didn't reflect in my bank account till now. Please help me with this situation. I am providing the details.

Bank of India account number : [protected]
Savings account
Name of account holder : Salil Saurav

Amazon refund reference no. 30005120362036137809889

I am also attaching the screenshots of the mails I have received.